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GPS Chipset 4.80 what`s new ?

Jardamkat over 4 years ago

Dear Garmin Team

What`s new? (like in topic)

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Garmin-Matthew over 4 years ago in reply to Fl0r1n +1

Change Log for GPS version 4.80:

Fixed bug to improve GPS reliability.
Fixed bug to improve time to first fix in certain conditions.
Luko79 over 4 years ago in reply to Fl0r1n +1

I think it will never be good , i suppose the Sony chipset has terrible bad multipath error correction (and/or the Edge antenna/pcb design is bad and there is huge noise on the board and noise filtering…

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0 Wongataa over 4 years ago in reply to Fl0r1n

Recalculation in these cases will also be sub optimal. It is just best to turn it off for most cases.

0 Former Member over 4 years ago

Hello, I just applied the upgrade (both GPS 4.80 and FW 6.25)

I use GPS accuracy widget. This widget shows GPS figures and its accuracy. it also shows a circle which size and color depends on accuracy.

If tunring on 830 and waiting for 1mn, accuracy is very good while not moving : less than 1m. BUT (!!) each time I start to move, even just walking, accuracy is really bad (up to 20m) : a bit like if GPS is still in my previous position. Then when I stop, accuracy become again very good. It is a bit like if GPS refresh is too slow.

I tryied all setup (GPS, GPS+Galilleo, GPS+Glonass)

So accuracy seems really good and HW layout also while not moving.

Is there any option to improve refresh period as it seems the bottleneck of this Sony chipset ?

I am not sure the battery is an issue for refresh : after 4 hours cycling, battery is at 60%.

Thanks

0 Luko79 over 4 years ago in reply to Former Member

i think they use the inbuilt gyroscope (IMU) together with GPS data and this is the reason when You stand the GPS's accuracy looks like so "good" (but that is not the real GPS accuracy for sure :) )